Method of making storage-battery electrodes.



HARRY onoss suesnnn, or nnwsnn, new JERSEY.

HIE-EH03 DIE MEiKING STORAGE-BATTERY ELECTRDDES.

ii, recess. 7 Specification s: bettcrsl'atent.

it c Brewing.

To all whom it may concern:

Be it known that L-HARRY Guess Hos; new. a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented a certain new and useful Improved Method of lllslzing Storage-Buttery Electrodes, of which the followingis a specification.

My present invention relates to an improsecl method. of making storage battery electrodes, especially those containin a mixture of active material and metal. laments for alkaline storage batteries.

1 will describe my method in connection with a, nickel active iheterial and nickel filoments with the understanding; that this is merely the preferred illustration and is not to be taken as a limitation oi the broad invent-ion to nickel, but on the contrary, the invention can be extended to other metals. For enarnle, l." take the precipitated green nickel hy iroxid enrl filter it in s. filter press. After washing the precipitate, I remove the clamp cakes and knead them together to seg cure uniformity throughout the mass; and

one yzes. sample therefromto determine the amount of nickel hydroxicl contained in the mini 6.0 this in a mixing,.machinc. Next, I;

mess. Then I return the mass tothe,mixing:v

machine and knead it with water into aslime, whereupon I add the desired proportion of filaments and further kneacl the mess. The inctthat the filaments are incorporated With the active material when it is in the iornr'of a slime makes it thoroughly and uniformly penetrate everywhere between and. around the filaments. The preferred form of these filaments, ribbons or fibers, or, in general, conducting" elements, is one to'three inches long by one-thirty-second of on. inch Wide bv about one-ten-thousanrlth of an inch. thick; but other forms such as scales, might be used. The material is then dried clown. preferably over steam heat to a thick dough. It is then preferably again Worked to further insure the uniformity of the mixture of the active material and filaments. Then the clough is put intou cylinder provided with e plunger which forces the. dough through a slit out of the cylinder in the form of a long narrow ribbon, say three inches Wide by oneeighthof an inch thick. This ribbon is receivecl upon a traveling belt or treybeneeth itencl is cut up into pieces, say four inches long. Each of these pieces measures 3 x i" x uric after being dried by steam Patented lolly 25, 1931s..

.Etpplicstion mes mvemim is, me: sci-m1 in. 732,14

heet,-is then placed in the cavity of e similarly shaped d1e,-the plunger is then forced. into the cavity to ,compress the tablet edgeise and bring it to a compressed dimension. of say 3 X 1" X 1 1;. An important result of this operation is. to turn most of the filo.- ments edgewise to the face of the tablet So that the electrolytic action can all. the more remlily occur through the active material between the filaments Some oi the further advantages of the new tablet are the following: I smable to dis sense with the use of o binder to holcl the fibers and active material together anal which if userhrenclers the plate less dense when.

subsequently. washed o-it. By'inski g. the nickel hyclroxld or otner equivulentective material set as its own binder, which i have iscovereii can only be done before it is dried, I produce. a permenently compact tablet containing e larger FlQPO'ilJlGH 0e tive material so that the resulting plate has increased capacity for its size.

To make up the plate ll prefer to assemble a plurality of these teblets'erlge to erlgs in a. suitable metal container of any usual or pre ferrezi sort. For the purposes of the process, it is essentiel that the iLC-tl'lJB material be precipibated,- meening thereby 1 that it shall be formed in some Wet way either by sctuail chemical precipitation by mixing it precipitoting reagent with a soluble sell: of the metal, or perhaps by electrolyticel precipitation Or some other wet method. For example, to electrolytically form nickel active material, I may marks a nickel plate the enocle in an electrolytic cell, whereupon uctive oxygen compounds of nickel "will be formed on the nickel plate encl may scraped off for use in my above process in making active material. but the precipitates active material, to make it set as own binder, must be used in the process before it has been fully dried, already pointeci out above.

What I claim is:

1. The process of making, stcrege lislitery rying one.

iatefi; active materia'i, and Without drying,

mixing ii with suitable conducting eiement-s;

x ii lg the masss tn .9. thick dough; forming the dough mite cakes, Qrymg smd cakes and strongly campy-653mg them edgewise.

3. Tbs process of making storage batterv .iectrccles which comprises taking precipiamd active rmteriai and wlthout dlying, meaeiing it into a slime with water; maxing said slime: with suitable mnducfing element-s;

1,1og ea HARRY CROSS HUBBELL,

Wit-messes E, W. Seaman, J12, A. C. MGDGNNELL. 

